How many atoms are there in the average human body?

According to Jefferson Lab, an average 70 Kg person, that's about 150 lbs, will have approximately 7*10 to the 27th atoms in their body. That's 7 followed by 27 zeros (7,000,000,000,000,000,000,000,000,000).

The number of stars in the Universe, which is estimated at 10*10 to the 21, or 10 followed by 21 zeros. (10,000,000,000,000,000,000,000).

So you can see that there are way more atoms in your body than there are stars in the universe.